Method for assessing loss of wind power plant affected by external wake flow

Abstract

The invention discloses a method for assessing loss of a wind power plant affected by external wake flow, which comprises the following steps: acquiring first anemometer tower wind speed sequence data, and correcting the first anemometer tower wind speed sequence data to obtain first free flow wind speed sequence data, wherein the first anemometer tower wind speed data are data of periods near theinitial stage without other wind power plant influences after the wind power plant is put into operation; and substituting the first free flow wind speed sequence data into CFD software, and performing calculating to obtain a first calculation theoretical generating capacity. The method for assessing the loss of the wind power plant affected by the external wake flow can be used for assessing theinfluence of the wake flows of other wind power plants on the wind power plant. The required data is easy to obtain, the calculation method is simple and easy to implement, the wind speed sequence ofthe anemometer tower is corrected, the data substituted into the CFD software is more accurate, and the accuracy of the evaluation result is higher.

Description

technical field [0001] The invention relates to the technical field of performance evaluation of wind farms, in particular to a method for evaluating losses of wind farms affected by external wakes based on meteorological reanalysis data. Background technique [0002] Wind is a new energy source with great potential. At the beginning of the eighteenth century, a violent gale swept across Britain and France, destroying 400 wind mills, 800 houses, 100 churches, and more than 400 sailing ships. Thousands of people were injured and 250,000 trees were uprooted. As far as pulling up trees is concerned, the wind generates 10 million horsepower (7.5 million kilowatts; 1 horsepower is equal to 0.75 kilowatts) in a few seconds! It has been estimated that there are about 10 billion kilowatts of wind power resources available on the earth for power generation, which is almost 10 times that of hydropower generation in the world today. At present, the energy obtained by burning coal in ...

AI Technical Summary

Problems solved by technology

The current large-scale wind power bases often do not fully consider the wake effect between wind farms during construction, and the distance between wind farms is very close, resulting in earlier wind farms being affected by the wake of nearby wind farms

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